Movement/rotation etc. hypersensitive in perspective view but normal in orthographics
Create 2 3D View windows.  Creating many windows in Blender is Easy. 


One in Orthogonal View.
Perspective View 

Perform the operation in Orthogonal,  while viewing in Perspective.  Also start your change with the mouse reasonably far away from the item in question to dampen the operation.  For example for small angles start with the mouse far away from the object.
Also other tools exist beyond Grab.  Try the Snap operation.